Pilot signal detection filter for a wireless communication devic

Details Pilot signal detection filter for a wireless communication devic Pilot signal detection filter for a wireless communication devic

1997-06-10

2000-09-19

Pham, Chi H.

Pulse or digital communications

Receivers

Interference or noise reduction

375340, 370491, 370500, H04B 100

Patent

active

061223344

ABSTRACT:
A novel and improved apparatus for a wireless communication device, which provides fast detection and validation of pilot signals while minimizing the probability of false detection. In the apparatus a searcher subsystem generates a pilot energy sample corresponding to a pilot signal, which is provided to a pilot signal detection filter, comprising two parallel branches. The first branch calculates a weighted historical average of a signal strength of the pilot signal in response to the pilot energy sample, the second branch verifies the pilot energy sample in a state machine, wherein transitions of the state machine are proportional to a magnitude of the pilot energy sample. A pilot detection signal is generated if either the weighted historical average exceeds selected threshold, or a state of the state machine exceeds a maximum value of the states.

REFERENCES:
patent: 4757319 (1988-07-01), Lankl
patent: 5490165 (1996-02-01), Blakeney, II et al.
patent: 5506865 (1996-04-01), Weaver, Jr.
patent: 5577022 (1996-11-01), Padovani et al.

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